Thermoelectric properties of NaCo2O4

被引：65

作者：

Kurosaki, K ^{[1
]}

Muta, H ^{[1
]}

Uno, M ^{[1
]}

Yamanka, S ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Dept Nucl Engn, Suita, Osaka 5650871, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2001年 / 315卷 / 1-2期

关键词：

transition metal compounds; electrical transport; heat conduction; thermoelectric power;

D O I：

10.1016/S0925-8388(00)01277-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The thermoelectric properties: such as the thermal conductivity, electrical resistivity and Seebeck coefficient of NaCo2O4, and NaCo1.9M0.1O4 (M=Ti, Rh, Pd) were evaluated in the temperature range from room temperature to 723 K. Polycrystalline samples were prepared by sintering in air followed by hot pressing. The thermal conductivity was calculated from the heat capacity, the experimental density, and the thermal diffusivity measured by the laser flash method, The electrical resistivity and Seebeck coefficient were measured simultaneously using ULVAC ZEM-1 in He atmosphere. The dimensionless figure of merit, ZT, of NaCo1.9Pd0.1O4 was higher than that of NaCo2O4 over a wide ranee of temperatures, and reached ZT = 0.045 at 773 K. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：234 / 236

页数：3

共 7 条

[1] Specific-heat evidence for strong electron correlations in the thermoelectric material (Na,Ca) Co2O4 [J].

Ando, Y ;

Miyamoto, N ;

Segawa, K ;

Kawata, T ;

Terasaki, I .

PHYSICAL REVIEW B, 1999, 60 (15) :10580-10583

[2]

Eucken A., 1932, FORSCH GEBIETE ING B, V3, P16

[3]

*JAP THERM MEAS SO, THERM DAT PERS COMP

[4] Na-site substitution effects on the thermoelectric properties of NaCo2O4 [J].

Kawata, T ;

Iguchi, Y ;

Itoh, T ;

Takahata, K ;

Terasaki, I .

PHYSICAL REVIEW B, 1999, 60 (15) :10584-10587

[5]

MAXWELL JC, 1891, TREATIES ELECT MAGNE, V1

[6] Large thermoelectric power in NaCo2O4 single crystals [J].

Terasaki, I ;

Sasago, Y ;

Uchinokura, K .

PHYSICAL REVIEW B, 1997, 56 (20) :12685-12687

[7] Thermoelectric properties of transition-metal oxide NaCo2O4 system [J].

Yakabe, H ;

Kikuchi, K ;

Terasaki, I ;

Sasago, Y ;

Uchinokura, K .

PROCEEDINGS ICT'97 - XVI INTERNATIONAL CONFERENCE ON THERMOELECTRICS, 1997, :523-527

← 1 →